removed extra "in"

trivial change
missing "is"

minor edit
Merge pull request #34 from radiofreejohn/patch-3

removed extra "in"
Merge pull request #35 from radiofreejohn/patch-4

missing "is"
Merge pull request #36 from radiofreejohn/master

code/html: fix double free condition with lval_del
Fix typo: exactly -> exact
preclude -> precede typo
Merge pull request #37 from radiofreejohn/master

minor fix: Lets->Let's
Merge pull request #38 from kragniz/fix-exactly-typo

Fix typo: exactly -> exact
Merge pull request #39 from NPrescott/master

preclude -> precede typo
{}--> nil, fun lookup removed
Fixed bug in string reading
Fixed memory leak in symbol retrieval
Updated tarbal
Remove unneeded symbol copy when overriding variables

We just checked that the symbol name is the same :)
Fix various wording mistakes in chapter 11
Fix "Invalid Number" error being raised erroneously

Set errno to 0 before using strtol.
Merge pull request #45 from sergof/small-fixes

Fix bug parsing numbers and a few smaller fixes
Updated tarball
merge