Correct the default foreground/background colors (#1435)

Author: daxian-dbw

.gitignore

@@ -7,6 +7,7 @@ PSReadline.zip
 # Build Folders (you can keep bin if you'd like, to store dlls and pdbs)
 [Bb]in/
 [Oo]bj/
+.ionide/
 
 # VSCode directories that are not at the repository root
 /**/.vscode/

PSReadLine/Cmdlets.cs

@@ -443,8 +443,8 @@ internal void ResetColors()
             if (fg == VTColorUtils.UnknownColor || bg == VTColorUtils.UnknownColor)
             {
                 // TODO: light vs. dark
-                fg = ConsoleColor.Black;
-                bg = ConsoleColor.Gray;
+                fg = ConsoleColor.Gray;
+                bg = ConsoleColor.Black;
             }
 
             SelectionColor = VTColorUtils.AsEscapeSequence(bg, fg);

PSReadLine/History.cs

@@ -34,10 +34,10 @@ internal static uint ComputeHash(string input)
             {
                 ch = input[i];
                 lowByte = (uint)(ch & 0x00FF);
-                hash = (hash ^ lowByte) * FNV32_PRIME;
+                hash = unchecked((hash ^ lowByte) * FNV32_PRIME);
 
                 highByte = (uint)(ch >> 8);
-                hash = (hash ^ highByte) * FNV32_PRIME;
+                hash = unchecked((hash ^ highByte) * FNV32_PRIME);
             }
 
             return hash;

PSReadLine/PSReadLine.csproj

@@ -7,6 +7,7 @@
     <AssemblyVersion>2.0.0.0</AssemblyVersion>
     <FileVersion>2.0.0</FileVersion>
     <InformationalVersion>2.0.0</InformationalVersion>
+    <CheckForOverflowUnderflow>true</CheckForOverflowUnderflow>
     <TargetFrameworks>net461;netcoreapp2.1</TargetFrameworks>
   </PropertyGroup>