C#: Add new paragraphs before call to action

Author: henrymercer

csharp/autobuilder/Semmle.Autobuild.CSharp/CSharpAutobuilder.cs

@@ -104,7 +104,7 @@ protected override void AutobuildFailureDiagnostic()
                         markdownMessage:
                             "CodeQL found multiple potential build scripts for your project and " +
                             $"attempted to run `{relScriptPath}`, which failed. " +
-                            "This may not be the right build script for your project. " +
+                            "This may not be the right build script for your project.\n\n" +
                             $"Set up a [manual build command]({buildCommandDocsUrl})."
                     ) :
                     new(
@@ -113,7 +113,7 @@ protected override void AutobuildFailureDiagnostic()
                         "Unable to build project using build script",
                         markdownMessage:
                             "CodeQL attempted to build your project using a script located at " +
-                            $"`{relScriptPath}`, which failed. " +
+                            $"`{relScriptPath}`, which failed.\n\n" +
                             $"Set up a [manual build command]({buildCommandDocsUrl})."
                     );
 

csharp/ql/integration-tests/posix-only/diag_autobuild_script/diagnostics.expected

@@ -2,7 +2,7 @@
   "attributes": {},
   "helpLinks": [],
   "internal": false,
-  "markdownMessage": "CodeQL attempted to build your project using a script located at `build.sh`, which failed. Set up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
+  "markdownMessage": "CodeQL attempted to build your project using a script located at `build.sh`, which failed.\n\nSet up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
   "severity": "error",
   "source": {
     "extractorName": "csharp",
@@ -19,7 +19,7 @@
   "attributes": {},
   "helpLinks": [],
   "internal": false,
-  "markdownMessage": "CodeQL could not find any project or solution files in your repository. Set up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
+  "markdownMessage": "CodeQL could not find any project or solution files in your repository.\n\nSet up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
   "severity": "error",
   "source": {
     "extractorName": "csharp",

csharp/ql/integration-tests/posix-only/diag_multiple_scripts/diagnostics.expected

@@ -2,7 +2,7 @@
   "attributes": {},
   "helpLinks": [],
   "internal": false,
-  "markdownMessage": "CodeQL could not find any project or solution files in your repository. Set up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
+  "markdownMessage": "CodeQL could not find any project or solution files in your repository.\n\nSet up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
   "severity": "error",
   "source": {
     "extractorName": "csharp",
@@ -19,7 +19,7 @@
   "attributes": {},
   "helpLinks": [],
   "internal": false,
-  "markdownMessage": "CodeQL found multiple potential build scripts for your project and attempted to run `build.sh`, which failed. This may not be the right build script for your project. Set up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
+  "markdownMessage": "CodeQL found multiple potential build scripts for your project and attempted to run `build.sh`, which failed. This may not be the right build script for your project.\n\nSet up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
   "severity": "error",
   "source": {
     "extractorName": "csharp",

csharp/ql/integration-tests/windows-only/diag_autobuild_script/diagnostics.expected

@@ -2,7 +2,7 @@
   "attributes": {},
   "helpLinks": [],
   "internal": false,
-  "markdownMessage": "CodeQL attempted to build your project using a script located at `build.bat`, which failed. Set up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
+  "markdownMessage": "CodeQL attempted to build your project using a script located at `build.bat`, which failed.\n\nSet up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
   "severity": "error",
   "source": {
     "extractorName": "csharp",
@@ -19,7 +19,7 @@
   "attributes": {},
   "helpLinks": [],
   "internal": false,
-  "markdownMessage": "CodeQL could not find any project or solution files in your repository. Set up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
+  "markdownMessage": "CodeQL could not find any project or solution files in your repository.\n\nSet up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
   "severity": "error",
   "source": {
     "extractorName": "csharp",

csharp/ql/integration-tests/windows-only/diag_multiple_scripts/diagnostics.expected

@@ -2,7 +2,7 @@
   "attributes": {},
   "helpLinks": [],
   "internal": false,
-  "markdownMessage": "CodeQL could not find any project or solution files in your repository. Set up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
+  "markdownMessage": "CodeQL could not find any project or solution files in your repository.\n\nSet up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
   "severity": "error",
   "source": {
     "extractorName": "csharp",
@@ -19,7 +19,7 @@
   "attributes": {},
   "helpLinks": [],
   "internal": false,
-  "markdownMessage": "CodeQL found multiple potential build scripts for your project and attempted to run `build.bat`, which failed. This may not be the right build script for your project. Set up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
+  "markdownMessage": "CodeQL found multiple potential build scripts for your project and attempted to run `build.bat`, which failed. This may not be the right build script for your project.\n\nSet up a [manual build command](https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-the-codeql-workflow-for-compiled-languages).",
   "severity": "error",
   "source": {
     "extractorName": "csharp",