Hello Guix,

The attatched patch fixes a typo in the description that causes the 
texinfo parsing to fail with:

$ guix package --search=hello
Backtrace:
           18 (primitive-load "/home/jackhill/.config/guix/current/bi…")
In guix/ui.scm:
   1654:12 17 (run-guix-command _ . _)
In ice-9/boot-9.scm:
     829:9 16 (catch _ _ #<procedure 7fa81e59b9b8 at guix/ui.scm:624…> …)
     829:9 15 (catch _ _ #<procedure 7fa81e59b9d0 at guix/ui.scm:750…> …)
In guix/scripts/package.scm:
     894:8 14 (_)
     742:9 13 (process-query _)
In ice-9/boot-9.scm:
     829:9 12 (catch _ _ #<procedure 7fa81c379470 at guix/scripts/pa…> …)
In guix/scripts/package.scm:
    744:24 11 (_)
    181:17 10 (find-packages-by-description _)
In guix/discovery.scm:
     179:3  9 (fold-module-public-variables _ _ _)
In guix/combinators.scm:
     45:26  8 (fold2 #<procedure 2149000 at guix/discovery.scm:179:1…> …)
     45:26  7 (fold2 #<procedure 37a78c0 at guix/discovery.scm:180:1…> …)
In guix/discovery.scm:
    182:33  6 (_ #<package r-minpack-lm@1.2-1 gnu/packages/cran.scm:…> …)
In guix/scripts/package.scm:
    184:38  5 (_ #<package r-minpack-lm@1.2-1 gnu/packages/cran.scm:…> …)
In srfi/srfi-1.scm:
    466:18  4 (fold #<procedure 29051c0 at guix/ui.scm:1318:8 (metri…> …)
In guix/ui.scm:
   1321:13  3 (_ _ 0)
   1197:23  2 (texi->plain-text _)
In texinfo.scm:
   1131:22  1 (parse _)
    966:36  0 (loop #<input: string 26ad850> (*fragment*) #<procedur…> …)

texinfo.scm:966:36: In procedure loop:
Throw to key `parser-error' with args `(#f "Unknown command" rode)'.


Best,
Jack