update tcl/en hyperlinks

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Jade Thornton 2018-10-22 20:59:56 -05:00
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@ -5,7 +5,7 @@ contributors:
filename: learntcl.tcl
---
Tcl was created by [John Ousterhout](https://wiki.tcl.tk/John%20Ousterout) as a
Tcl was created by [John Ousterhout](https://wiki.tcl-lang.org/page/John+Ousterhout) as a
reusable scripting language for circuit design tools that he authored. In 1997 he
was awarded the [ACM Software System
Award](https://en.wikipedia.org/wiki/ACM_Software_System_Award) for Tcl. Tcl
@ -283,7 +283,7 @@ set c [expr {$a + $b}]
# Since "expr" performs variable substitution on its own, brace the expression
# to prevent Tcl from performing variable substitution first. See
# "http://wiki.tcl.tk/Brace%20your%20#%20expr-essions" for details.
# "https://wiki.tcl-lang.org/page/Brace+your+expr-essions" for details.
# "expr" understands variable and script substitution:
@ -581,8 +581,8 @@ a
## Reference
[Official Tcl Documentation](http://www.tcl.tk/man/tcl/)
[Official Tcl Documentation](https://www.tcl-lang.org)
[Tcl Wiki](http://wiki.tcl.tk)
[Tcl Wiki](https://wiki.tcl-lang.org)
[Tcl Subreddit](http://www.reddit.com/r/Tcl)