fix markdownlint warnings. (#1373)

README.md

@@ -1,25 +1,30 @@
 # GPSBabel
-This is the source code for [GPSBabel](https://www.gpsbabel.org), the free software project to manage GPS data (waypoints, tracks, routes) in your GPSes or in related programs.
 
-# Welcome new open source contributors
+This is the source code for [GPSBabel](https://www.gpsbabel.org), the free
+software project to manage GPS data (waypoints, tracks, routes) in your
+GPSes or in related programs.
 
+***Welcome new open source contributors***.
 We have a [GPSBabel contributor guide](https://github.com/gpsbabel/gpsbabel/blob/master/README.contrib).
 [![Pull Requests Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat)](http://makeapullrequest.com)
 
 Current status of the master branch build is:
--   [![CodeQL](https://github.com/GPSBabel/gpsbabel/workflows/CodeQL/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3ACodeQL)
--   [![Fedora](https://github.com/GPSBabel/gpsbabel/workflows/fedora/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3Afedora)
--   [![macOS](https://github.com/GPSBabel/gpsbabel/workflows/macos/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3Amacos)
--   [![ubuntu](https://github.com/GPSBabel/gpsbabel/workflows/ubuntu/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3Aubuntu)
--   [![windows](https://github.com/GPSBabel/gpsbabel/workflows/windows/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3Awindows)
 
-Passing is good. We like passing. 
+- [![CodeQL](https://github.com/GPSBabel/gpsbabel/workflows/CodeQL/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3ACodeQL)
+- [![Fedora](https://github.com/GPSBabel/gpsbabel/workflows/fedora/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3Afedora)
+- [![macOS](https://github.com/GPSBabel/gpsbabel/workflows/macos/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3Amacos)
+- [![ubuntu](https://github.com/GPSBabel/gpsbabel/workflows/ubuntu/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3Aubuntu)
+- [![windows](https://github.com/GPSBabel/gpsbabel/workflows/windows/badge.svg?branch=master)](https://github.com/GPSBabel/gpsbabel/actions?query=workflow%3Awindows)
 
-The latest official release is available at http://www.gpsbabel.org/download.html.
+Passing is good. We like passing.
+
+The latest official release is available at <http://www.gpsbabel.org/download.html>.
 
 We are proud of our rating on Codacy: [![Codacy Badge](https://app.codacy.com/project/badge/Grade/b87af2d47325425cbaeea5805eff2c6b)](https://app.codacy.com/gh/GPSBabel/gpsbabel/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade)
 
-If you aren't a programmer or a writer, we need help with gear, hosting costs, tool license prices, answering questions on the mailing lists, etc. Please [support GPSBabel](https://www.gpsbabel.org/contribute.html) any way you can.
+If you aren't a programmer or a writer, we need help with gear, hosting costs,
+tool license prices, answering questions on the mailing lists, etc. Please
+[support GPSBabel](https://www.gpsbabel.org/contribute.html) any way you can.
 
 Chief Babel-Head
 [@robertlipe](https://github.com/robertlipe)

SECURITY.md

@@ -8,16 +8,16 @@ Only the current shipping version and the development trunk are supported.
 
 ## Reporting a Vulnerability
 
-File a bugreport at https://github.com/GPSBabel/gpsbabel/issues please.
+File a bugreport at <https://github.com/GPSBabel/gpsbabel/issues> please.
 Include all steps necessary to reproduce.
 
-Hypotheticals like "If a bit in RAM is corrupted between this store and 
+Hypotheticals like "If a bit in RAM is corrupted between this store and
 this load" will be closed. We're a real product that deals in real issues
-only. 
+only.
 
 We are inherently reading untrusted input and often from untrusted
 sources, so running a file converter as root on your server is bad. Don't
-do that. If you insist on doing it, please run ulimit to minimize the 
+do that. If you insist on doing it, please run ulimit to minimize the
 time and CPU load that can be used. An adversary can hand craft (or just
 plain have) a corrupt or malformed file and sending it to you might make
 GPSBabel loop forever. We try for that to not happen, but it's a necessary