More signature files (#2678)

* Add signature file for Context.fsi. Remove unused code.

* Add signature file for Utils.fs

* Add signature file for ISourceTextExtensions.fs

* Add signature file for RangeHelpers.fs

* Add signature file for Validation.fs

* Duplicate normalizeNewLine 😅

Directory.Build.props

@@ -25,8 +25,8 @@ Some common use cases include:
         <PackageProjectUrl>https://fsprojects.github.io/fantomas/</PackageProjectUrl>
         <DisableImplicitFSharpCoreReference>true</DisableImplicitFSharpCoreReference>
         <SuppressNETCoreSdkPreviewMessage>true</SuppressNETCoreSdkPreviewMessage>
-        <WarningsAsErrors>FS0025</WarningsAsErrors>
-        <WarnOn>3390;$(WarnOn)</WarnOn>
+        <WarningsAsErrors>FS0025;FS1182</WarningsAsErrors>
+        <WarnOn>1182;3390;$(WarnOn)</WarnOn>
         <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
         <RestoreLockedMode>true</RestoreLockedMode>
         <NoWarn>NU1603</NoWarn>

src/Fantomas.Core.Tests/ContextTests.fs

@@ -90,17 +90,14 @@ let ``nested exceedsMultiline expression should bubble up to parent check`` () =
     let expression =
         !- "let a ="
         +> autoIndentAndNlnIfExpressionExceedsPageWidth (
-            sepOpenA
-            +> expressionFitsOnRestOfLine
+            expressionFitsOnRestOfLine
                 // short expression, should cross the max page width of 50
                 (!- "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" +> !- "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB")
                 // fallback expression
-                (sepNln
-                 +> !- "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+                (!- "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
                  +> sepNln
                  +> !- "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB"
                  +> sepNln)
-            +> sepCloseA
         )
 
     let config =
@@ -119,7 +116,6 @@ let ``nested exceedsMultiline expression should bubble up to parent check`` () =
         equal
         """
 let a =
-    [|
     AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
     BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
-    |]"""
+"""

src/Fantomas.Core.Tests/TestHelpers.fs

@@ -10,6 +10,13 @@ open Fantomas.Core
 [<assembly: Parallelizable(ParallelScope.All)>]
 do ()
 
+[<RequireQualifiedAccess>]
+module String =
+    let normalizeNewLine (str: string) =
+        str.Replace("\r\n", "\n").Replace("\r", "\n")
+
+    let normalizeThenSplitNewLine (str: string) = (normalizeNewLine str).Split('\n')
+
 let config = FormatConfig.Default
 let newline = "\n"