Fix some rustdoc error capitalization

Author: estebank

src/librustdoc/passes/mod.rs

@@ -344,7 +344,7 @@ pub fn look_for_tests<'tcx>(
             lint::builtin::MISSING_DOC_CODE_EXAMPLES,
             hir_id,
             sp,
-            "Missing code example in this documentation");
+            "missing code example in this documentation");
         diag.emit();
     } else if check_missing_code == false &&
               tests.found_tests > 0 &&
@@ -353,7 +353,7 @@ pub fn look_for_tests<'tcx>(
             lint::builtin::PRIVATE_DOC_TESTS,
             hir_id,
             span_of_attrs(&item.attrs).unwrap_or(item.source.span()),
-            "Documentation test in private item");
+            "documentation test in private item");
         diag.emit();
     }
 }
@@ -367,7 +367,7 @@ crate fn span_of_attrs(attrs: &clean::Attributes) -> Option<Span> {
     if start == DUMMY_SP {
         return None;
     }
-    let end = attrs.doc_strings.last().expect("No doc strings provided").span();
+    let end = attrs.doc_strings.last().expect("no doc strings provided").span();
     Some(start.to(end))
 }
 

src/test/rustdoc-ui/doc-without-codeblock.rs

@@ -1,13 +1,13 @@
-#![deny(missing_doc_code_examples)] //~ ERROR Missing code example in this documentation
+#![deny(missing_doc_code_examples)] //~ ERROR missing code example in this documentation
 
 /// Some docs.
-//~^ ERROR Missing code example in this documentation
+//~^ ERROR missing code example in this documentation
 pub struct Foo;
 
 /// And then, the princess died.
-//~^ ERROR Missing code example in this documentation
+//~^ ERROR missing code example in this documentation
 pub mod foo {
     /// Or maybe not because she saved herself!
-    //~^ ERROR Missing code example in this documentation
+    //~^ ERROR missing code example in this documentation
     pub fn bar() {}
 }

src/test/rustdoc-ui/doc-without-codeblock.stderr

@@ -1,4 +1,4 @@
-error: Missing code example in this documentation
+error: missing code example in this documentation
   --> $DIR/doc-without-codeblock.rs:1:1
    |
 LL | / #![deny(missing_doc_code_examples)]
@@ -16,19 +16,19 @@ note: lint level defined here
 LL | #![deny(missing_doc_code_examples)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: Missing code example in this documentation
+error: missing code example in this documentation
   --> $DIR/doc-without-codeblock.rs:3:1
    |
 LL | /// Some docs.
    | ^^^^^^^^^^^^^^
 
-error: Missing code example in this documentation
+error: missing code example in this documentation
   --> $DIR/doc-without-codeblock.rs:7:1
    |
 LL | /// And then, the princess died.
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: Missing code example in this documentation
+error: missing code example in this documentation
   --> $DIR/doc-without-codeblock.rs:10:5
    |
 LL |     /// Or maybe not because she saved herself!

src/test/rustdoc-ui/lint-group.rs

@@ -14,11 +14,11 @@
 pub fn link_error() {} //~^^^^^ ERROR cannot be resolved, ignoring it
 
 /// wait, this doesn't have a doctest?
-pub fn no_doctest() {} //~^ ERROR Missing code example in this documentation
+pub fn no_doctest() {} //~^ ERROR missing code example in this documentation
 
 /// wait, this *does* have a doctest?
 ///
 /// ```
 /// println!("sup");
 /// ```
-fn private_doctest() {} //~^^^^^ ERROR Documentation test in private item
+fn private_doctest() {} //~^^^^^ ERROR documentation test in private item

src/test/rustdoc-ui/lint-group.stderr

@@ -1,4 +1,4 @@
-error: Documentation test in private item
+error: documentation test in private item
   --> $DIR/lint-group.rs:19:1
    |
 LL | / /// wait, this *does* have a doctest?
@@ -29,7 +29,7 @@ LL | #![deny(rustdoc)]
    = note: `#[deny(intra_doc_link_resolution_failure)]` implied by `#[deny(rustdoc)]`
    = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
 
-error: Missing code example in this documentation
+error: missing code example in this documentation
   --> $DIR/lint-group.rs:16:1
    |
 LL | /// wait, this doesn't have a doctest?

src/test/rustdoc-ui/lint-missing-doc-code-example.stderr

@@ -1,4 +1,4 @@
-error: Missing code example in this documentation
+error: missing code example in this documentation
   --> $DIR/lint-missing-doc-code-example.rs:19:1
    |
 LL | / mod module1 {
@@ -11,7 +11,7 @@ note: lint level defined here
 LL | #![deny(missing_doc_code_examples)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: Missing code example in this documentation
+error: missing code example in this documentation
   --> $DIR/lint-missing-doc-code-example.rs:37:3
    |
 LL |   /// doc

src/test/rustdoc-ui/private-item-doc-test.rs

@@ -6,6 +6,6 @@ mod foo {
     /// ```
     /// assert!(false);
     /// ```
-    //~^^^^^ ERROR Documentation test in private item
+    //~^^^^^ ERROR documentation test in private item
     fn bar() {}
 }

src/test/rustdoc-ui/private-item-doc-test.stderr

@@ -1,4 +1,4 @@
-error: Documentation test in private item
+error: documentation test in private item
   --> $DIR/private-item-doc-test.rs:4:5
    |
 LL | /     /// private doc test