fix-no-newline-parse

Dearest Reviewer,

Issue stalwartlabs#90 brought up the issue that if there was no newline. the user
provided an easy reproduction case. I was able to track it down to the
parse raw function.

The issue is that the loop hits the end of the string and returns Empty.
However, if there is a start offset then some characters were found. This
code just checks the offset after the loop.

If this is not the correct behavior please close.

Thanks for your time
Becker

Author: sbeckeriv

src/parsers/fields/raw.rs

@@ -37,7 +37,13 @@ impl<'x> MessageStream<'x> {
             token_end = self.offset();
         }
 
-        HeaderValue::Empty
+        if token_start > 0 {
+            HeaderValue::Text(String::from_utf8_lossy(
+                self.bytes(token_start - 1..token_end),
+            ))
+        } else {
+            HeaderValue::Empty
+        }
     }
 
     pub fn parse_and_ignore(&mut self) {
@@ -70,6 +76,7 @@ mod tests {
                     "for <mary@example.net>;  21 Nov 1997 10:05:43 -0600"
                 ),
             ),
+            ("Re: Saying Hello", "Re: Saying Hello"), // No newline test
         ];
 
         for (input, expected) in inputs {