Expanding out character range, socompilation is now a select case rather than an If

src/Compilers/VisualBasic/Portable/Scanner/Scanner.vb

@@ -1148,7 +1148,9 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.Syntax.InternalSyntax
                         Return ScanIdentifierOrKeyword(precedingTrivia)
                     End If
 
-                Case "a"c To "z"c
+                Case "a"c, "b"c, "c"c, "d"c, "e"c, "f"c, "g"c, "h"c, "i"c, "j"c, "k"c, "l"c,
+                        "m"c, "n"c, "o"c, "p"c, "q"c, "r"c, "s"c, "t"c, "u"c, "v"c, "w"c, "x"c,
+                        "y"c, "z"c
                     Return ScanIdentifierOrKeyword(precedingTrivia)
 
                 Case "B"c, "C"c, "D"c, "F"c, "G"c, "H"c, "J"c, "K"c, "L"c, "M"c, "N"c, "O"c, "P"c, "Q"c,
@@ -1379,7 +1381,9 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.Syntax.InternalSyntax
                         Return ScanIdentifierOrKeyword(precedingTrivia)
                     End If
 
-                Case "a"c To "z"c
+                Case "a"c, "b"c, "c"c, "d"c, "e"c, "f"c, "g"c, "h"c, "i"c, "j"c, "k"c, "l"c,
+                        "m"c, "n"c, "o"c, "p"c, "q"c, "r"c, "s"c, "t"c, "u"c, "v"c, "w"c, "x"c,
+                        "y"c, "z"c
                     Return ScanIdentifierOrKeyword(precedingTrivia)
 
                 Case "B"c, "C"c, "D"c, "F"c, "G"c, "H"c, "J"c, "K"c, "L"c, "M"c, "N"c, "O"c, "P"c, "Q"c,