patch 8.2.0740: minor message mistakes

Problem:    Minor message mistakes.
Solution:   Change vim to Vim and other fixes.
diff --git a/src/if_tcl.c b/src/if_tcl.c
index 45d880b..17e20ee 100644
--- a/src/if_tcl.c
+++ b/src/if_tcl.c
@@ -1403,7 +1403,7 @@
     }
     else if (did_emsg)
     {
-	Tcl_SetResult(interp, _("vim error"), TCL_STATIC);
+	Tcl_SetResult(interp, _("Vim error"), TCL_STATIC);
 	return TCL_ERROR;
     }
     return TCL_OK;