Remove a few remaining mentions of the develop branch

CONTRIBUTING.md

@@ -6,7 +6,7 @@ Please use the following guidelines when preparing changes:
 
 ## Submitting Code Changes
 
-* The preferred method for submitting changes is by github pull request against the "develop" branch.
+* The preferred method for submitting changes is by github pull request against the "master" branch.
 * Pull requests should include only a focused and related set of changes. Mixed features and unrelated changes may be rejected.
 * For major changes, it is recommended to discuss your plans on the mailing list or in a github issue before putting in too much effort.
 * The following deprecations are being considered by the maintainers

azure-pipelines.yml

@@ -16,7 +16,7 @@ pr:
 
 variables:
   OFFICIAL_REPO: 'pyqtgraph/pyqtgraph'
-  DEFAULT_MERGE_BRANCH: 'develop'
+  DEFAULT_MERGE_BRANCH: 'master'
   disable.coverage.autogenerate: 'true'
 
 stages:

doc/source/installation.rst

@@ -49,9 +49,9 @@ To get access to the very latest features and bugfixes you have three choices:
 
 2. Directly install from GitHub repo::
 
-    $ pip install git+git://github.com/pyqtgraph/pyqtgraph.git@develop
+    $ pip install git+git://github.com/pyqtgraph/pyqtgraph.git@master
 
-   You can change ``develop`` of the above command to the branch name or the
+   You can change ``master`` of the above command to the branch name or the
    commit you prefer.
 
 3. You can simply place the pyqtgraph folder someplace importable, such as

tools/setupHelpers.py

@@ -255,11 +255,11 @@ def checkMergeSize(
         sourceRepo = '..'
 
     if targetBranch is None:
-        if sourceBranch == 'develop':
-            targetBranch = 'develop'
+        if sourceBranch == 'master':
+            targetBranch = 'master'
             targetRepo = 'https://github.com/pyqtgraph/pyqtgraph.git'
         else:
-            targetBranch = 'develop'
+            targetBranch = 'master'
             targetRepo = '..'
 
     workingDir = '__merge-test-clone'