dev-manual: Fixed typo for "${INC_PR}.0"

The string appeared in the text as "$(INC_PR).0".  So, fixed
it to be proper with the curly braces.

(From yocto-docs rev: 113296272e60da09c88660d09a5e8ba06f0fda7a)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/dev-manual/dev-manual-common-tasks.xml

@@ -7499,26 +7499,29 @@
                 </para>
 
                 <para>
-                    If a committed change results in changing the package output,
-                    then the value of the PR variable needs to be increased
-                    (or "bumped") as part of that commit.
+                    If a committed change results in changing the package
+                    output, then the value of the PR variable needs to be
+                    increased (or "bumped") as part of that commit.
                     For new recipes you should add the <filename>PR</filename>
-                    variable and set its initial value equal to "r0", which is the default.
-                    Even though the default value is "r0", the practice of adding it to a new recipe makes
-                    it harder to forget to bump the variable when you make changes
-                    to the recipe in future.
+                    variable and set its initial value equal to "r0", which is
+                    the default.
+                    Even though the default value is "r0", the practice of
+                    adding it to a new recipe makes it harder to forget to bump
+                    the variable when you make changes to the recipe in future.
                 </para>
 
                 <para>
-                    If you are sharing a common <filename>.inc</filename> file with multiple recipes,
-                    you can also use the
+                    If you are sharing a common <filename>.inc</filename> file
+                    with multiple recipes, you can also use the
                     <filename><ulink url='&YOCTO_DOCS_REF_URL;#var-INC_PR'>INC_PR</ulink></filename>
-                    variable to ensure that
-                    the recipes sharing the <filename>.inc</filename> file are rebuilt when the
+                    variable to ensure that the recipes sharing the
+                    <filename>.inc</filename> file are rebuilt when the
                     <filename>.inc</filename> file itself is changed.
-                    The <filename>.inc</filename> file must set <filename>INC_PR</filename>
-                    (initially to "r0"), and all recipes referring to it should set <filename>PR</filename>
-                    to "$(INC_PR).0" initially, incrementing the last number when the recipe is changed.
+                    The <filename>.inc</filename> file must set
+                    <filename>INC_PR</filename> (initially to "r0"), and all
+                    recipes referring to it should set <filename>PR</filename>
+                    to "${INC_PR}.0" initially, incrementing the last number
+                    when the recipe is changed.
                     If the <filename>.inc</filename> file is changed then its
                     <filename>INC_PR</filename> should be incremented.
                 </para>
@@ -7527,14 +7530,14 @@
                     When upgrading the version of a package, assuming the
                     <filename><ulink url='&YOCTO_DOCS_REF_URL;#var-PV'>PV</ulink></filename>
                     changes, the <filename>PR</filename> variable should be
-                    reset to "r0" (or "$(INC_PR).0" if you are using
+                    reset to "r0" (or "${INC_PR}.0" if you are using
                     <filename>INC_PR</filename>).
                 </para>
 
                 <para>
                     Usually, version increases occur only to packages.
-                    However, if for some reason <filename>PV</filename> changes but does not
-                    increase, you can increase the
+                    However, if for some reason <filename>PV</filename> changes
+                    but does not increase, you can increase the
                     <filename><ulink url='&YOCTO_DOCS_REF_URL;#var-PE'>PE</ulink></filename>
                     variable (Package Epoch).
                     The <filename>PE</filename> variable defaults to "0".
@@ -7544,7 +7547,8 @@
                     Version numbering strives to follow the
                     <ulink url='http://www.debian.org/doc/debian-policy/ch-controlfields.html'>
                     Debian Version Field Policy Guidelines</ulink>.
-                    These guidelines define how versions are compared and what "increasing" a version means.
+                    These guidelines define how versions are compared and what
+                    "increasing" a version means.
                 </para>
             </section>
         </section>