Replace “--” with “—” where appropriate

gnu-agpl-v3.0.md

@@ -16,7 +16,7 @@ cooperation with the community in the case of network server software.
 The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works.  By contrast,
 our General Public Licenses are intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
+share and change all versions of a program—to make sure it remains free
 software for all its users.
 
 When we speak of free software, we are referring to freedom, not

gnu-fdl-v1.3.md

@@ -241,7 +241,7 @@ These titles must be distinct from any other section titles.
 
 You may add a section Entitled “Endorsements”, provided it contains
 nothing but endorsements of your Modified Version by various
-parties--for example, statements of peer review or that the text has
+parties—for example, statements of peer review or that the text has
 been approved by an organization as the authoritative definition of a
 standard.
 

gnu-gpl-v1.0.md

@@ -13,7 +13,7 @@ of this license document, but changing it is not allowed.
 The license agreements of most software companies try to keep users
 at the mercy of those companies.  By contrast, our General Public
 License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  The
+software—to make sure the software is free for all its users.  The
 General Public License applies to the Free Software Foundation's
 software and to any other program whose authors commit to using it.
 You can use it for your programs, too.
@@ -228,7 +228,7 @@ when it starts in an interactive mode:
 The hypothetical commands `show w` and `show c` should show the
 appropriate parts of the General Public License.  Of course, the
 commands you use may be called something other than `show w` and `show c`;
-they could even be mouse-clicks or menu items--whatever suits your program.
+they could even be mouse-clicks or menu items—whatever suits your program.
 
 You should also get your employer (if you work as a programmer) or your
 school, if any, to sign a “copyright disclaimer” for the program, if

gnu-gpl-v2.0.md

@@ -13,7 +13,7 @@ of this license document, but changing it is not allowed.
 The licenses for most software are designed to take away your
 freedom to share and change it.  By contrast, the GNU General Public
 License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  This
+software—to make sure the software is free for all its users.  This
 General Public License applies to most of the Free Software
 Foundation's software and to any other program whose authors commit to
 using it.  (Some other Free Software Foundation software is covered by
@@ -317,7 +317,7 @@ when it starts in an interactive mode:
 The hypothetical commands `show w` and `show c` should show the appropriate
 parts of the General Public License.  Of course, the commands you use may
 be called something other than `show w` and `show c`; they could even be
-mouse-clicks or menu items--whatever suits your program.
+mouse-clicks or menu items—whatever suits your program.
 
 You should also get your employer (if you work as a programmer) or your
 school, if any, to sign a “copyright disclaimer” for the program, if

gnu-gpl-v3.0.md

@@ -15,7 +15,7 @@ kinds of works.
 The licenses for most software and other practical works are designed to take away
 your freedom to share and change the works. By contrast, the GNU General Public
 License is intended to guarantee your freedom to share and change all versions of a
-program--to make sure it remains free software for all its users. We, the Free
+program—to make sure it remains free software for all its users. We, the Free
 Software Foundation, use the GNU General Public License for most of our software; it
 applies also to any other work released this way by its authors. You can apply it to
 your programs, too.

gnu-lgpl-v2.1.md

@@ -17,10 +17,10 @@ the version number 2.1._
 The licenses for most software are designed to take away your
 freedom to share and change it.  By contrast, the GNU General Public
 Licenses are intended to guarantee your freedom to share and change
-free software--to make sure the software is free for all its users.
+free software—to make sure the software is free for all its users.
 
 This license, the Lesser General Public License, applies to some
-specially designated software packages--typically libraries--of the
+specially designated software packages—typically libraries—of the
 Free Software Foundation and other authors who decide to use it.  You
 can use it too, but we suggest you first think carefully about whether
 this license or the ordinary General Public License is the better