[tex-k] lack of space around path operators in METAFONTbook

[胡亚捷 (Hu Yajie)]

Page C130, line 26
    `z0 .. z1{curl 1}&{curl 1}z1 .. z2 .. cycle'.
should be
    `z0 .. z1{curl 1} & {curl 1}z1 .. z2 .. cycle'.

Page C298, line 13
    --subpath(t,T) of r shifted .5up -- cycle) enddef;
should be
    -- subpath(t,T) of r shifted .5up -- cycle) enddef;