I seen this issue at various places, but I will quote from extending.pdf:
Chapter 3: 'Building C and C++ Extensions with distutils' shows two long
gcc commands.

gcc -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -fPIC -DMAJOR_VERSION=1
-DMINOR_VERSION=0 -I/usr/local/include -I/usr/local/include/python2.2 -c
demo.c -o build/temp.linux-i686-2.2/demo.o

gcc -shared build/temp.linux-i686-2.2/demo.o -L/usr/local/lib -ltcl83 -o
build/lib.linux-i686-2.2/demo.so

The HTML version at http://docs.python.org/extending/building.html uses
a slider to be able to see all the code, but the PDF-version does not
have this feature. Consequently, the text is chopped off at the right
hand side after the 98th character.