Merge pull request matplotlib#30919 from star1327p/a-an-usage

DOC: Correct typos on a/an usage including print messages

Author: rcomer

doc/devel/contribute.rst

@@ -337,7 +337,7 @@ Start a pull request
 
 The preferred way to contribute to Matplotlib is to fork the `main
 repository <https://github.com/matplotlib/matplotlib/>`__ on GitHub,
-then submit a "pull request" (PR). To work on a a pull request:
+then submit a "pull request" (PR). To work on a pull request:
 
 #. **First** set up a development environment, either by cloning a copy of the
    Matplotlib repository to your own computer or by using Github codespaces, by

doc/devel/license.rst

@@ -10,7 +10,7 @@ another project make sure it has a PSF, BSD, MIT or compatible license
 licenses).  If it doesn't, you may consider contacting the author and
 asking them to relicense it.  GPL and LGPL code are not acceptable in
 the main code base, though we are considering an alternative way of
-distributing L/GPL code through an separate channel, possibly a
+distributing L/GPL code through a separate channel, possibly a
 toolkit.  If you include code, make sure you include a copy of that
 code's license in the license directory if the code's license requires
 you to distribute the license with it.  Non-BSD compatible licenses

doc/release/next_whats_new/README.rst

@@ -34,7 +34,7 @@ Include contents of the form::
     details should be left out when they do not impact usage, for example
     implementation details.
 
-    The description may include a a short instructive example, if it helps to
+    The description may include a short instructive example, if it helps to
     understand the feature.
 
 Please avoid using references in section titles, as it causes links to be

galleries/examples/color/color_demo.py

@@ -16,7 +16,7 @@
 5) a single letter string, i.e. one of
    ``{'b', 'g', 'r', 'c', 'm', 'y', 'k', 'w'}``, which are short-hand notations
    for shades of blue, green, red, cyan, magenta, yellow, black, and white;
-6) a X11/CSS4 ("html") color name, e.g. ``"blue"``;
+6) an X11/CSS4 ("html") color name, e.g. ``"blue"``;
 7) a name from the `xkcd color survey <https://xkcd.com/color/rgb/>`__,
    prefixed with ``'xkcd:'`` (e.g., ``'xkcd:sky blue'``);
 8) a "Cn" color spec, i.e. ``'C'`` followed by a number, which is an index into

galleries/examples/text_labels_and_annotations/multiline.py

@@ -11,7 +11,7 @@
 
 ax0.set_aspect(1)
 ax0.plot(np.arange(10))
-ax0.set_xlabel('this is a xlabel\n(with newlines!)')
+ax0.set_xlabel('this is an xlabel\n(with newlines!)')
 ax0.set_ylabel('this is vertical\ntest', multialignment='center')
 ax0.text(2, 7, 'this is\nyet another test',
          rotation=45,

galleries/users_explain/figure/event_handling.rst

@@ -605,7 +605,7 @@ Picking exercise
 
 Create a data set of 100 arrays of 1000 Gaussian random numbers and
 compute the sample mean and standard deviation of each of them (hint:
-NumPy arrays have a mean and std method) and make a xy marker plot of
+NumPy arrays have a mean and std method) and make an xy marker plot of
 the 100 means vs. the 100 standard deviations.  Connect the line
 created by the plot command to the pick event, and plot the original
 time series of the data that generated the clicked on points.  If more

galleries/users_explain/toolkits/axisartist.rst

@@ -131,7 +131,7 @@ few things that mpl_toolkits.axisartist.Axes is different from original
 Axes from Matplotlib.
 
 * Axis elements (axis line(spine), ticks, ticklabel and axis labels)
-  are drawn by a AxisArtist instance. Unlike Axis, left, right, top
+  are drawn by an AxisArtist instance. Unlike Axis, left, right, top
   and bottom axis are drawn by separate artists. And each of them may
   have different tick location and different tick labels.
 
@@ -569,7 +569,7 @@ See the first example of this page.
 Current limitations and TODO's
 ==============================
 
-The code need more refinement. Here is a incomplete list of issues and TODO's
+The code need more refinement. Here is an incomplete list of issues and TODO's
 
 * No easy way to support a user customized tick location (for
   curvilinear grid). A new Locator class needs to be created.

lib/matplotlib/backends/qt_editor/figureoptions.py

@@ -92,7 +92,7 @@ def prepare_data(d, init):
         `"None"`, `"none"` and `""` are synonyms); *init* is one shorthand
         of the initial style.
 
-        This function returns an list suitable for initializing a
+        This function returns a list suitable for initializing a
         FormLayout combobox, namely `[initial_name, (shorthand,
         style_name), (shorthand, style_name), ...]`.
         """

lib/matplotlib/dates.py

@@ -537,7 +537,7 @@ def drange(dstart, dend, delta):
     # calculate end of the interval which will be generated
     dinterval_end = dstart + num * delta
 
-    # ensure, that an half open interval will be generated [dstart, dend)
+    # ensure, that a half open interval will be generated [dstart, dend)
     if dinterval_end >= dend:
         # if the endpoint is greater than or equal to dend,
         # just subtract one delta

lib/matplotlib/figure.py

@@ -2766,7 +2766,7 @@ def show(self, warn=True):
 
         .. warning::
 
-            This does not manage an GUI event loop. Consequently, the figure
+            This does not manage a GUI event loop. Consequently, the figure
             may only be shown briefly or not shown at all if you or your
             environment are not managing an event loop.