Fix excludeByFile documentation (#833)

Fix excludeByFile documentation

Author: MarcoRossignoli

Documentation/GlobalTool.md

@@ -172,11 +172,10 @@ coverlet <ASSEMBLY> --target <TARGET> --targetargs <TARGETARGS> --exclude-by-att
 
 You can also ignore specific source files from code coverage using the `--exclude-by-file` option
  - Can be specified multiple times
- - Use absolute or relative paths (relative to the project directory)
  - Use file path or directory path with globbing (e.g `dir1/*.cs`)
 
 ```bash
-coverlet <ASSEMBLY> --target <TARGET> --targetargs <TARGETARGS> --exclude-by-file "../dir1/class1.cs"
+coverlet <ASSEMBLY> --target <TARGET> --targetargs <TARGETARGS> --exclude-by-file "**/dir1/class1.cs"
 ```
 
 ### Filters

Documentation/MSBuildIntegration.md

@@ -120,11 +120,10 @@ dotnet test /p:CollectCoverage=true /p:ExcludeByAttribute="Obsolete,GeneratedCod
 ### Source Files
 You can also ignore specific source files from code coverage using the `ExcludeByFile` property
  - Use single or multiple paths (separate by comma)
- - Use absolute or relative paths (relative to the project directory)
  - Use file path or directory path with globbing (e.g `dir1/*.cs`)
 
 ```bash
-dotnet test /p:CollectCoverage=true /p:ExcludeByFile=\"../dir1/class1.cs,../dir2/*.cs,../dir3/**/*.cs\"
+dotnet test /p:CollectCoverage=true /p:ExcludeByFile=\"**/dir1/class1.cs,**/dir2/*.cs,**/dir3/**/*.cs\"
 ```
 
 ### Filters

Documentation/VSTestIntegration.md

@@ -92,7 +92,7 @@ How to specify these options via runsettings?
           <Exclude>[coverlet.*.tests?]*,[*]Coverlet.Core*</Exclude> <!-- [Assembly-Filter]Type-Filter -->
           <Include>[coverlet.*]*,[*]Coverlet.Core*</Include> <!-- [Assembly-Filter]Type-Filter -->
           <ExcludeByAttribute>Obsolete,GeneratedCodeAttribute,CompilerGeneratedAttribute</ExcludeByAttribute>
-          <ExcludeByFile>../dir1/class1.cs,../dir2/*.cs,../dir3/**/*.cs,</ExcludeByFile> <!-- Absolute or relative file paths -->
+          <ExcludeByFile>**/dir1/class1.cs,**/dir2/*.cs,**/dir3/**/*.cs,</ExcludeByFile> <!-- Globbing filter -->
           <IncludeDirectory>../dir1/,../dir2/,</IncludeDirectory>
           <SingleHit>false</SingleHit>
           <UseSourceLink>true</UseSourceLink>