[Markdown Exporter] [YAML Exporter] Ensure exported entires end in a newline

Fixes #768, Fixes #881.

If the exported entry does not have a final empty line, this will add one on export. Some Markdown parsers get picky about not having a empty line above a heading....

.gitignore

@@ -42,12 +42,15 @@ obj
 # virtaulenv
 env/
 env*/
+venv*/
 
 # PyCharm Project files
 .idea/
 
-# export testing director
+# export testing directories
 exp/
+bug768/
+exported_journal/
 
 _extras/
 *.sublime-*

features/regression.feature

@@ -122,3 +122,40 @@ Feature: Zapped bugs should stay dead.
         Then the output should contain "This thing happened yesterday"
         Then the output should contain "Adding an entry right now."
         Then the output should not contain "A future entry."
+
+    # See issues #768 and #881
+    # the "deletion" journal is used because it doesn't have a newline at the
+    # end of the last entry
+    Scenario: Add a blank line to Markdown export is there isn't one already
+        Given we use the config "deletion.yaml"
+        When we run "jrnl --export markdown"
+        Then the output should be
+        """
+        # 2019
+
+        ## October
+
+        ### 2019-10-29 11:11 First entry.
+
+
+        ### 2019-10-29 11:11 Second entry.
+
+
+        ### 2019-10-29 11:13 Third entry.
+
+        """
+
+    # See issues #768 and #881
+    Scenario: Add a blank line to YAML export is there isn't one already
+        Given we use the config "deletion.yaml"
+        And we created a directory named "bug768"
+        When we run "jrnl --export yaml -o bug768"
+        Then "bug768" should contain the files ["2019-10-29_first-entry.md", "2019-10-29_second-entry.md", "2019-10-29_third-entry.md"]
+        And the content of exported yaml "bug768/2019-10-29_third-entry.md" should be
+        """
+        title: Third entry.
+        date: 2019-10-29 11:13
+        stared: False
+        tags:
+
+        """

jrnl/plugins/markdown_exporter.py

@@ -54,6 +54,10 @@ class MarkdownExporter(TextExporter):
             previous_line = line
         newbody = newbody + previous_line  # add very last line
 
+        # make sure the export ends with a blank line
+        if previous_line not in ['\r', '\n', '\r\n', '\n\r']:
+            newbody = newbody + os.linesep
+
         if warn_on_heading_level is True:
             print(
                 f"{WARNING_COLOR}WARNING{RESET_COLOR}: "

jrnl/plugins/yaml_exporter.py

@@ -66,6 +66,10 @@ class YAMLExporter(TextExporter):
             previous_line = line
         newbody = newbody + previous_line  # add very last line
 
+        # make sure the export ends with a blank line
+        if previous_line not in ['\r', '\n', '\r\n', '\n\r']:
+            newbody = newbody + os.linesep
+
         if warn_on_heading_level is True:
             print(
                 "{}WARNING{}: Headings increased past H6 on export - {} {}".format(