join docs korro update

Author: AndreiKingsley

docs/StardustDocs/topics/operations/multiple/join.md

@@ -119,6 +119,9 @@ objects will be used as join columns:
 
 <!---FUN dfLeftImplicit-->
 
+```kotlin
+dfLeft
+```
 
 <!---END-->
 
@@ -127,7 +130,9 @@ objects will be used as join columns:
 
 <!---FUN dfRightImplicit-->
 
-
+```kotlin
+dfRight
+```
 
 <!---END-->
 
@@ -139,7 +144,7 @@ objects will be used as join columns:
 ```kotlin
 // INNER JOIN on all same-named columns ("name" and "city"):
 // Merge when BOTH name AND city are equal; otherwise the row is dropped.
-dfLeft.join(dfRight)
+dfLeft.join(dfRight) { name and city }
 ```
 
 <!---END-->

samples/build.gradle.kts

@@ -112,6 +112,7 @@ korro {
         include("docs/StardustDocs/topics/format.md")
         include("docs/StardustDocs/topics/guides/*.md")
         include("docs/StardustDocs/topics/operations/utils/*.md")
+        include("docs/StardustDocs/topics/operations/multiple/*.md")
         include("docs/StardustDocs/topics/operations/column/*.md")
         include("docs/StardustDocs/topics/collectionsInterop/*.md")
         include("docs/StardustDocs/topics/dataSources/sql/*.md")
@@ -122,6 +123,7 @@ korro {
         include("src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/*.kt")
         include("src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/*.kt")
         include("src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/utils/*.kt")
+        include("src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/multiple/*.kt")
         include("src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/render/*.kt")
         include("src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/collectionsInterop/*.kt")
         include("src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/column/*.kt")

samples/src/test/kotlin/org/jetbrains/kotlinx/dataframe/util/defaultHeaderFormatting.kt

@@ -1,6 +1,5 @@
 package org.jetbrains.kotlinx.dataframe.util
 
-import org.jetbrains.kotlinx.dataframe.AnyColumnReference
 import org.jetbrains.kotlinx.dataframe.ColumnsSelector
 import org.jetbrains.kotlinx.dataframe.DataFrame
 import org.jetbrains.kotlinx.dataframe.api.CellAttributes
@@ -9,26 +8,25 @@ import org.jetbrains.kotlinx.dataframe.api.FormattingDsl
 import org.jetbrains.kotlinx.dataframe.api.and
 import org.jetbrains.kotlinx.dataframe.api.formatHeader
 import org.jetbrains.kotlinx.dataframe.api.getColumnsWithPaths
-import org.jetbrains.kotlinx.dataframe.api.select
 import org.jetbrains.kotlinx.dataframe.api.with
 
 internal val baseColorSet = listOf(
-    FormattingDsl.rgb(244, 67, 54),   // red
-    FormattingDsl.rgb(33, 150, 243),  // blue
-    FormattingDsl.rgb(76, 175, 80),   // green
-    FormattingDsl.rgb(255, 152, 0),   // orange
-    FormattingDsl.rgb(156, 39, 176),  // purple
-    FormattingDsl.rgb(0, 150, 136),   // teal
-    FormattingDsl.rgb(233, 30, 99)    // pink/magenta
+    FormattingDsl.rgb(244, 67, 54), // red
+    FormattingDsl.rgb(33, 150, 243), // blue
+    FormattingDsl.rgb(76, 175, 80), // green
+    FormattingDsl.rgb(255, 152, 0), // orange
+    FormattingDsl.rgb(156, 39, 176), // purple
+    FormattingDsl.rgb(0, 150, 136), // teal
+    FormattingDsl.rgb(233, 30, 99), // pink/magenta
 )
 
 internal val FormattingDsl.monospace: CellAttributes
     get() = attr(
         "font-family",
-        "ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace"
+        "ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace",
     )
 
-internal fun <T> DataFrame<T>.defaultHeaderFormatting(headers: ColumnsSelector<T, *>): FormattedFrame<T>  {
+internal fun <T> DataFrame<T>.defaultHeaderFormatting(headers: ColumnsSelector<T, *>): FormattedFrame<T> {
     val columns = getColumnsWithPaths(headers)
     require(columns.size <= baseColorSet.size) {
         "Too many headers: ${columns.size}. Max supported is ${baseColorSet.size}."
@@ -45,7 +43,7 @@ internal fun <T> DataFrame<T>.defaultHeaderFormatting(headers: ColumnsSelector<T
 }
 
 @Suppress("INVISIBLE_REFERENCE")
-internal fun <T> FormattedFrame<T>.defaultHeaderFormatting(headers: ColumnsSelector<T, *>): FormattedFrame<T>  {
+internal fun <T> FormattedFrame<T>.defaultHeaderFormatting(headers: ColumnsSelector<T, *>): FormattedFrame<T> {
     val columns = df.getColumnsWithPaths(headers)
     require(columns.size <= baseColorSet.size) {
         "Too many headers: ${columns.size}. Max supported is ${baseColorSet.size}."