Trim trailing new lines from file

src/format.rs

@@ -144,6 +144,7 @@ pub fn format_file(
     }
 
     new_text = remove_trailing_spaces(&new_text);
+    new_text = remove_trailing_blank_lines(&new_text);
     record_file_log(logs, Info, file, "Formatting complete.");
     new_text
 }

src/subs.rs

@@ -26,6 +26,13 @@ pub fn remove_trailing_spaces(text: &str) -> String {
     RE_TRAIL.replace_all(text, LINE_END).to_string()
 }
 
+/// Remove trailing blank lines from file
+pub fn remove_trailing_blank_lines(text: &str) -> String {
+    let mut new_text = text.trim_end().to_string();
+    new_text.push_str(LINE_END);
+    new_text
+}
+
 /// Check if line contains content which be split onto a new line
 pub fn needs_split(line: &str, pattern: &Pattern) -> bool {
     // Check if we should format this line and if we've matched an environment.

tests/source/short_document.tex

@@ -27,7 +27,7 @@
 multiple lines
 \item Item three
 \begin{itemize}
-\item Subitem one of item two
+\item Subitem one of item two % this line has trailing spaces    
 \item Subitem two of item two
 \end{itemize}
 \item Item four % trailing comment % with [( brackets
@@ -56,3 +56,8 @@
 and is broken over three lines}.
 
 \end{document}
+
+% This file ends with trailing newlines
+
+
+

tests/target/empty.tex

@@ -0,0 +1 @@
+

tests/target/short_document.tex

@@ -27,7 +27,7 @@
     multiple lines
   \item Item three
     \begin{itemize}
-      \item Subitem one of item two
+      \item Subitem one of item two % this line has trailing spaces
       \item Subitem two of item two
     \end{itemize}
   \item Item four % trailing comment % with [( brackets
@@ -56,3 +56,5 @@
 and is broken over three lines}.
 
 \end{document}
+
+% This file ends with trailing newlines