fix extra slash in python install location

CHANGELOG.md

 # Python Buildpack Changelog
 
+# 142 (2018-10-22)
+
+Python 3.7.1, 3.6.7 and 3.5.6 now available on all Heroku stacks.
+
 # 141 (2018-10-10)
 
 Switch to cautious upgrade for Pipenv install to ensure the pinned pip version

builds/runtimes/python-3.5.6

@@ -15,7 +15,7 @@ sqlite3_install "$OUT_PREFIX" "$SQLITE3_VERSION" 1
 echo "Building Python…"
 SOURCE_TARBALL='https://python.org/ftp/python/3.5.6/Python-3.5.6.tgz'
 curl -L $SOURCE_TARBALL | tar xz
-mv Python-3.7.0 src
+mv Python-3.5.6 src
 cd src
 
 ./configure --prefix=$OUT_PREFIX --with-ensurepip=no
@@ -26,4 +26,7 @@ make install
 # https://github.com/docker-library/python
 find "${OUT_PREFIX}" \( -type d -a \( -name test -o -name tests \) \) -exec rm -rf '{}' +
 
-ln $OUT_PREFIX/bin/python3 $OUT_PREFIX/bin/python
+# Remove spare /
+LOCATION=${OUT_PREFIX%?}
+
+ln $LOCATION/bin/python3 $LOCATION/bin/python

builds/runtimes/python-3.6.7

@@ -15,7 +15,7 @@ sqlite3_install "$OUT_PREFIX" "$SQLITE3_VERSION" 1
 echo "Building Python…"
 SOURCE_TARBALL='https://python.org/ftp/python/3.6.7/Python-3.6.7.tgz'
 curl -L $SOURCE_TARBALL | tar xz
-mv Python-3.7.0 src
+mv Python-3.6.7 src
 cd src
 
 ./configure --prefix=$OUT_PREFIX --with-ensurepip=no
@@ -26,4 +26,7 @@ make install
 # https://github.com/docker-library/python
 find "${OUT_PREFIX}" \( -type d -a \( -name test -o -name tests \) \) -exec rm -rf '{}' +
 
-ln $OUT_PREFIX/bin/python3 $OUT_PREFIX/bin/python
+# Remove spare /
+LOCATION=${OUT_PREFIX%?}
+
+ln $LOCATION/bin/python3 $LOCATION/bin/python

builds/runtimes/python-3.7.1

@@ -15,7 +15,7 @@ sqlite3_install "$OUT_PREFIX" "$SQLITE3_VERSION" 1
 echo "Building Python…"
 SOURCE_TARBALL='https://python.org/ftp/python/3.7.1/Python-3.7.1.tgz'
 curl -L $SOURCE_TARBALL | tar xz
-mv Python-3.7.0 src
+mv Python-3.7.1 src
 cd src
 
 ./configure --prefix=$OUT_PREFIX --with-ensurepip=no
@@ -26,4 +26,7 @@ make install
 # https://github.com/docker-library/python
 find "${OUT_PREFIX}" \( -type d -a \( -name test -o -name tests \) \) -exec rm -rf '{}' +
 
-ln $OUT_PREFIX/bin/python3 $OUT_PREFIX/bin/python
+# Remove spare /
+LOCATION=${OUT_PREFIX%?}
+
+ln $LOCATION/bin/python3 $LOCATION/bin/python