Prettier now applies a 100 character print width to Markdown files (#1447)

Also:
- Reformatted all Markdown files in the project
- Updated CHANGELOG.md to add placeholder for 2.6 release
- Added cmd2.css file in mkdocs.yml that enables consuming a larger percentage of the screen's width
- Updated "make install" command to be quieter when installing npm dependencies

Author: tleonhardt

.github/CODE_OF_CONDUCT.md

@@ -2,17 +2,14 @@
 
 ## Our Pledge
 
-In the interest of fostering an open and welcoming environment, we as
-contributors and maintainers pledge to making participation in our project and
-our community a harassment-free experience for everyone, regardless of age, body
-size, disability, ethnicity, gender identity and expression, level of experience,
-nationality, personal appearance, race, religion, or sexual identity and
-orientation.
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers
+pledge to making participation in our project and our community a harassment-free experience for
+everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level
+of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
 
 ## Our Standards
 
-Examples of behavior that contributes to creating a positive environment
-include:
+Examples of behavior that contributes to creating a positive environment include:
 
 - Using welcoming and inclusive language
 - Being respectful of differing viewpoints and experiences
@@ -22,53 +19,47 @@ include:
 
 Examples of unacceptable behavior by participants include:
 
-- The use of sexualized language or imagery and unwelcome sexual attention or
-  advances
+- The use of sexualized language or imagery and unwelcome sexual attention or advances
 - Trolling, insulting/derogatory comments, and personal or political attacks
 - Public or private harassment
-- Publishing others' private information, such as a physical or electronic
-  address, without explicit permission
-- Other conduct which could reasonably be considered inappropriate in a
-  professional setting
+- Publishing others' private information, such as a physical or electronic address, without explicit
+  permission
+- Other conduct which could reasonably be considered inappropriate in a professional setting
 
 ## Our Responsibilities
 
-Project maintainers are responsible for clarifying the standards of acceptable
-behavior and are expected to take appropriate and fair corrective action in
-response to any instances of unacceptable behavior.
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are
+expected to take appropriate and fair corrective action in response to any instances of unacceptable
+behavior.
 
-Project maintainers have the right and responsibility to remove, edit, or
-reject comments, commits, code, wiki edits, issues, and other contributions
-that are not aligned to this Code of Conduct, or to ban temporarily or
-permanently any contributor for other behaviors that they deem inappropriate,
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits,
+code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or
+to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate,
 threatening, offensive, or harmful.
 
 ## Scope
 
-This Code of Conduct applies both within project spaces and in public spaces
-when an individual is representing the project or its community. Examples of
-representing a project or community include using an official project e-mail
-address, posting via an official social media account, or acting as an appointed
-representative at an online or offline event. Representation of a project may be
+This Code of Conduct applies both within project spaces and in public spaces when an individual is
+representing the project or its community. Examples of representing a project or community include
+using an official project e-mail address, posting via an official social media account, or acting as
+an appointed representative at an online or offline event. Representation of a project may be
 further defined and clarified by project maintainers.
 
 ## Enforcement
 
-Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by contacting the project team at todd.leonhardt at gmail.com. All
-complaints will be reviewed and investigated and will result in a response that
-is deemed necessary and appropriate to the circumstances. The project team is
-obligated to maintain confidentiality with regard to the reporter of an incident.
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting
+the project team at todd.leonhardt at gmail.com. All complaints will be reviewed and investigated
+and will result in a response that is deemed necessary and appropriate to the circumstances. The
+project team is obligated to maintain confidentiality with regard to the reporter of an incident.
 Further details of specific enforcement policies may be posted separately.
 
-Project maintainers who do not follow or enforce the Code of Conduct in good
-faith may face temporary or permanent repercussions as determined by other
-members of the project's leadership.
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face
+temporary or permanent repercussions as determined by other members of the project's leadership.
 
 ## Attribution
 
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
-available at [http://contributor-covenant.org/version/1/4][version]
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at
+[http://contributor-covenant.org/version/1/4][version]
 
 [homepage]: http://contributor-covenant.org
 [version]: http://contributor-covenant.org/version/1/4/