[bc] Update & modernize Plan style.

Signed-off-by: Fletcher Nichol <fnichol@nichol.ca>

bc/plan.sh

@@ -2,8 +2,13 @@ pkg_name=bc
 pkg_origin=core
 pkg_version=1.07.1
 pkg_maintainer="The Habitat Maintainers <humans@habitat.sh>"
+pkg_description="\
+bc is an arbitrary precision numeric processing language. Syntax is similar \
+to C, but differs in many substantial areas. It supports interactive \
+execution of statements. bc is a utility included in the POSIX P1003.2/D11 \
+draft standard.\
+"
 pkg_upstream_url="https://www.gnu.org/software/bc/"
-pkg_description="bc is an arbitrary precision numeric processing language"
 pkg_license=("GPL-3.0")
 pkg_source="https://ftp.gnu.org/gnu/${pkg_name}/${pkg_name}-${pkg_version}.tar.gz"
 pkg_shasum="62adfca89b0a1c0164c2cdca59ca210c1d44c3ffc46daf9931cf4942664cb02a"
@@ -17,7 +22,6 @@ pkg_build_deps=(
   core/bison
   core/coreutils
   core/diffutils
-  core/ed
   core/gcc
   core/make
   core/patch
@@ -26,12 +30,12 @@ pkg_build_deps=(
 pkg_bin_dirs=(bin)
 
 do_prepare() {
-	# Both fixes here thanks to:
-	# http://www.linuxfromscratch.org/lfs/view/development/chapter06/bc.html
+  # Both fixes here thanks to:
+  # http://www.linuxfromscratch.org/lfs/view/development/chapter06/bc.html
 
   sed -i -e '/flex/s/as_fn_error/: ;; # &/' configure
 
-	cat > bc/fix-libmath_h << "EOF"
+  cat > bc/fix-libmath_h << "EOF"
 #!/bin/bash
 sed -e '1   s/^/{"/' \
     -e     's/$/",/' \
@@ -64,6 +68,8 @@ do_check() {
 # significantly altered. Thank you!
 # ----------------------------------------------------------------------------
 if [[ "$STUDIO_TYPE" = "stage1" ]]; then
-  pkg_deps=(core/glibc core/readline)
-  pkg_build_deps=(core/gcc core/coreutils)
+  pkg_build_deps=(
+    core/gcc
+    core/coreutils
+  )
 fi