cmd: Partial fix for echo's special ':' handling.

programs/cmd/builtins.c

@@ -861,10 +861,10 @@ void WCMD_echo (const WCHAR *command) {
   int count;
   const WCHAR *origcommand = command;
 
-  if (command[0]==' ' || command[0]=='.')
+  if (command[0]==' ' || command[0]=='.' || command[0]==':')
     command++;
   count = strlenW(command);
-  if (count == 0 && origcommand[0]!='.') {
+  if (count == 0 && origcommand[0]!='.' && origcommand[0]!=':') {
     if (echo_mode) WCMD_output (WCMD_LoadMessage(WCMD_ECHOPROMPT), onW);
     else WCMD_output (WCMD_LoadMessage(WCMD_ECHOPROMPT), offW);
     return;

programs/cmd/tests/test_builtins.cmd.exp

@@ -31,13 +31,13 @@ word
 .word
 
 @todo_wine@@pwd@>echo:
-@todo_wine@
+
 
 @pwd@>echo :@space@
 :
 
 @todo_wine@@pwd@>echo:word
-@todo_wine@word
+word
 
 @pwd@>echo :word@space@
 :word
@@ -57,9 +57,9 @@ at-echoed-word
 .
 word
 .word
-@todo_wine@
+
 :
-@todo_wine@word
+word
 :word
 word@space@
 word@space@@space@