ci: Fold some lines in config where possible

The `if:` expressions don't need to preserve newlines, for example.

Author: QuLogic

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -16,7 +16,7 @@ body:
     id: reproduction
     attributes:
       label: Code for reproduction
-      description: |
+      description: >-
         If possible, please provide a minimum self-contained example.
       placeholder: Paste your code here. This field is automatically formatted as Python code.
       render: python
@@ -26,7 +26,7 @@ body:
     id: actual
     attributes:
       label: Actual outcome
-      description: |
+      description: >-
         Paste the output produced by the code provided above, e.g.
         console output, images/videos produced by the code, any relevant screenshots/screencasts, etc.
     validations:

.github/ISSUE_TEMPLATE/documentation.yml

@@ -8,10 +8,9 @@ body:
     id: link
     attributes:
       label: Documentation Link
-      description: |
-        Link to any documentation or examples that you are referencing.
-        Suggested improvements should be based on the development version of the docs:
-        https://matplotlib.org/devdocs/
+      description: >-
+        Link to any documentation or examples that you are referencing. Suggested improvements should be based
+        on [the development version of the docs](https://matplotlib.org/devdocs/)
       placeholder: https://matplotlib.org/devdocs/...
   - type: textarea
     id: problem

.github/ISSUE_TEMPLATE/tag_proposal.yml

@@ -6,8 +6,8 @@ labels: [Tag proposal]
 body:
   - type: markdown
     attributes:
-      value: |
-         Please search the [tag glossary]() for relevant tags before creating a new tag proposal.
+      value: >-
+        Please search the [tag glossary]() for relevant tags before creating a new tag proposal.
   - type: textarea
     id: need
     attributes:
@@ -24,5 +24,5 @@ body:
     id: solution
     attributes:
       label: Proposed solution
-      description: >
+      description: >-
         What should the tag be? All tags are in the format `subcategory: tag`

.github/workflows/cibuildwheel.yml

@@ -23,7 +23,7 @@ permissions:
 
 jobs:
   build_sdist:
-    if: |
+    if: >-
       github.event_name == 'push' ||
       github.event_name == 'pull_request' && (
         (
@@ -76,7 +76,7 @@ jobs:
           if-no-files-found: error
 
   build_wheels:
-    if: |
+    if: >-
       github.event_name == 'push' ||
       github.event_name == 'pull_request' && (
         (

.github/workflows/cygwin.yml

@@ -49,7 +49,7 @@ jobs:
   test-cygwin:
     runs-on: windows-latest
     name: Python 3.${{ matrix.python-minor-version }} on Cygwin
-    if: |
+    if: >-
       github.event_name == 'workflow_dispatch' ||
       github.event_name == 'schedule' ||
       (

.github/workflows/tests.yml

@@ -30,7 +30,7 @@ env:
 
 jobs:
   test:
-    if: |
+    if: >-
       github.event_name == 'workflow_dispatch' ||
       (
         github.repository == 'matplotlib/matplotlib' &&
@@ -278,9 +278,7 @@ jobs:
 
       - name: Install the nightly dependencies
         # Only install the nightly dependencies during the scheduled event
-        if: |
-          github.event_name == 'schedule' &&
-          matrix.name-suffix != '(Minimum Versions)'
+        if: github.event_name == 'schedule' && matrix.name-suffix != '(Minimum Versions)'
         run: |
           python -m pip install pytz tzdata  # Must be installed for Pandas.
           python -m pip install \