Support loading files that do not end with a EOL sequence

- do not drop the last line of such files from TextLoader
- add a flag to TextLoader to indicate if the loaded file ended with a
  EOL sequence

src/core/TextLoader.cc

@@ -60,16 +60,23 @@ void TextLoader::load_buffer(uint8_t * buffer, size_t size)
     if (crlf && (n_lf > 0u))
     {
         m_line_endings = LINE_ENDING_CRLF;
-        m_lines = lines[LINE_ENDING_CRLF];
     }
     else if ((n_cr > 0u) && (n_lf == 0u))
     {
         m_line_endings = LINE_ENDING_CR;
-        m_lines = lines[LINE_ENDING_CR];
     }
     else
     {
         m_line_endings = LINE_ENDING_LF;
-        m_lines = lines[LINE_ENDING_LF];
+    }
+
+    m_lines = lines[m_line_endings];
+
+    /* Check if there is a line that was not terminated by a EOL sequence at
+     * the end of the file. */
+    if (line_start[m_line_endings] < size)
+    {
+        m_lines->push_back(LineIndexPair(&buffer[line_start[m_line_endings]], size - line_start[m_line_endings]));
+        m_eol_at_eof = false;
     }
 }