Use a better grayscale color for the suggestion text

Author: daxian-dbw

PSReadLine/Render.cs

@@ -374,7 +374,8 @@ void MaybeEmphasize(int i, string currColor)
             if (suggestion != null)
             {
                 // TODO: write suggestion out in dark black by default, but it needs to be configurable.
-                color = "\x1b[90m";
+                // Find the most suitable color using https://stackoverflow.com/a/33206814
+                color = "\x1b[38;5;238m";
                 UpdateColorsIfNecessary(color);
 
                 foreach (char charToRender in suggestion)

PSReadLine/Suggestion.cs

@@ -21,15 +21,16 @@ static DummySuggestion()
                 "git diff",
                 "git diff --cached",
                 "git add -u",
-                "git add -A"
+                "git add -A",
+                "start",
             };
         }
 
         internal static string GetCommandLineSuggestion(string text)
         {
             foreach (string candidate in s_suggestions)
             {
-                if (candidate.StartsWith(text, StringComparison.OrdinalIgnoreCase))
+                if (candidate.Length > text.Length && candidate.StartsWith(text, StringComparison.OrdinalIgnoreCase))
                 {
                     return candidate;
                 }