Fix typos

build-aux/m4/ax_boost_base.m4

@@ -10,7 +10,7 @@
 #
 #   Test for the Boost C++ libraries of a particular version (or newer)
 #
-#   If no path to the installed boost library is given the macro searchs
+#   If no path to the installed boost library is given the macro searches
 #   under /usr, /usr/local, /opt and /opt/local and evaluates the
 #   $BOOST_ROOT environment variable. Further documentation is available at
 #   <http://randspringer.de/boost/index.html>.
@@ -119,7 +119,7 @@ if test "x$want_boost" = "xyes"; then
     libsubdirs="lib/`$CXX -dumpmachine 2>/dev/null` $libsubdirs"
 
     dnl first we check the system location for boost libraries
-    dnl this location ist chosen if boost libraries are installed with the --layout=system option
+    dnl this location is chosen if boost libraries are installed with the --layout=system option
     dnl or if you install boost with RPM
     if test "$ac_boost_path" != ""; then
         BOOST_CPPFLAGS="-I$ac_boost_path/include"

build-aux/m4/ax_gcc_func_attribute.m4

@@ -61,7 +61,7 @@
 #    weak
 #    weakref
 #
-#   Unsuppored function attributes will be tested with a prototype returning
+#   Unsupported function attributes will be tested with a prototype returning
 #   an int and not accepting any arguments and the result of the check might
 #   be wrong or meaningless so use with care.
 #

zcutil/make-release.py

@@ -70,7 +70,7 @@ def parse_args(args):
     p.add_argument(
         'RELEASE_HEIGHT',
         type=int,
-        help='A block height approximately occuring on release day.',
+        help='A block height approximately occurring on release day.',
     )
     return p.parse_args(args)