[lldb] Correct style of error messages (#156774)

The LLVM Style Guide says the following about error and warning messages
[1]:

> [T]o match error message styles commonly produced by other tools,
> start the first sentence with a lowercase letter, and finish the last
> sentence without a period, if it would end in one otherwise.

I often provide this feedback during code review, but we still have a
bunch of places where we have inconsistent error message, which bothers
me as a user. This PR identifies a handful of those places and updates
the messages to be consistent.

[1] https://llvm.org/docs/CodingStandards.html#error-and-warning-messages

1 files changed, 2 insertions, 2 deletions

diff --git a/lldb/source/Commands/CommandObjectCommands.cpp b/lldb/source/Commands/CommandObjectCommands.cpp
index 3049eb8..a3293f0 100644
--- a/lldb/source/Commands/CommandObjectCommands.cpp
+++ b/lldb/source/Commands/CommandObjectCommands.cpp
@@ -418,7 +418,7 @@ protected:
       if ((pos != std::string::npos) && (pos > 0))
         raw_command_string = raw_command_string.substr(pos);
     } else {
-      result.AppendError("Error parsing command string.  No alias created.");
+      result.AppendError("error parsing command string.  No alias created");
       return;
     }
 
@@ -2888,7 +2888,7 @@ protected:
     size_t num_args = command.GetArgumentCount();
 
     if (num_args == 0) {
-      result.AppendError("No command was specified.");
+      result.AppendError("no command was specified");
       return;
     }