remove weird double spaces, remove /EXPORT from build.bat in favor of __declspec(dllexport)

code/shell/shell.c

@@ -118,7 +118,7 @@ static char* trim(char* s) {
 }
 
 // ---------------------------------------------------------------------------
-// Run one command.  Returns 1 if the shell should exit.
+// Run one command. Returns 1 if the shell should exit.
 // ---------------------------------------------------------------------------
 static int runCommand(const char* cmd) {
     if (!cmd || *cmd == '\0')