No if/unless-modifier on multiline blocks.

Library/Homebrew/cmd/gist-logs.rb

@@ -94,13 +94,15 @@ module Homebrew
 
   def load_logs(dir)
     logs = {}
-    dir.children.sort.each do |file|
-      contents = file.size? ? file.read : "empty log"
-      # small enough to avoid GitHub "unicorn" page-load-timeout errors
-      max_file_size = 1_000_000
-      contents = truncate_text_to_approximate_size(contents, max_file_size, front_weight: 0.2)
-      logs[file.basename.to_s] = { content: contents }
-    end if dir.exist?
+    if dir.exist?
+      dir.children.sort.each do |file|
+        contents = file.size? ? file.read : "empty log"
+        # small enough to avoid GitHub "unicorn" page-load-timeout errors
+        max_file_size = 1_000_000
+        contents = truncate_text_to_approximate_size(contents, max_file_size, front_weight: 0.2)
+        logs[file.basename.to_s] = { content: contents }
+      end
+    end
     raise "No logs." if logs.empty?
     logs
   end

Library/Homebrew/extend/ENV/shared.rb

@@ -98,11 +98,12 @@ module SharedEnvExtension
   end
 
   def remove(keys, value)
+    return if value.nil?
     Array(keys).each do |key|
       next unless self[key]
       self[key] = self[key].sub(value, "")
       delete(key) if self[key].empty?
-    end if value
+    end
   end
 
   def cc

Library/Homebrew/extend/enumerable.rb

@@ -1,11 +1,13 @@
 module Enumerable
-  def flat_map
-    return to_enum(:flat_map) unless block_given?
-    r = []
-    each do |*args|
-      result = yield(*args)
-      result.respond_to?(:to_ary) ? r.concat(result) : r.push(result)
+  unless method_defined?(:flat_map)
+    def flat_map
+      return to_enum(:flat_map) unless block_given?
+      r = []
+      each do |*args|
+        result = yield(*args)
+        result.respond_to?(:to_ary) ? r.concat(result) : r.push(result)
+      end
+      r
     end
-    r
-  end unless method_defined?(:flat_map)
+  end
 end

Library/Homebrew/extend/pathname.rb

@@ -148,13 +148,17 @@ class Pathname
     open("a", *open_args) { |f| f.puts(content) }
   end
 
-  def binwrite(contents, *open_args)
-    open("wb", *open_args) { |f| f.write(contents) }
-  end unless method_defined?(:binwrite)
+  unless method_defined?(:binwrite)
+    def binwrite(contents, *open_args)
+      open("wb", *open_args) { |f| f.write(contents) }
+    end
+  end
 
-  def binread(*open_args)
-    open("rb", *open_args, &:read)
-  end unless method_defined?(:binread)
+  unless method_defined?(:binread)
+    def binread(*open_args)
+      open("rb", *open_args, &:read)
+    end
+  end
 
   # NOTE always overwrites
   def atomic_write(content)
@@ -353,13 +357,15 @@ class Pathname
     File.symlink(src.relative_path_from(dirname), self)
   end
 
-  def /(other)
-    unless other.respond_to?(:to_str) || other.respond_to?(:to_path)
-      opoo "Pathname#/ called on #{inspect} with #{other.inspect} as an argument"
-      puts "This behavior is deprecated, please pass either a String or a Pathname"
+  unless method_defined?(:/)
+    def /(other)
+      unless other.respond_to?(:to_str) || other.respond_to?(:to_path)
+        opoo "Pathname#/ called on #{inspect} with #{other.inspect} as an argument"
+        puts "This behavior is deprecated, please pass either a String or a Pathname"
+      end
+      self + other.to_s
     end
-    self + other.to_s
-  end unless method_defined?(:/)
+  end
 
   # @private
   def ensure_writable

Library/Homebrew/formula_installer.rb

@@ -814,9 +814,11 @@ class FormulaInstaller
 
   def lock
     return unless (@@locked ||= []).empty?
-    formula.recursive_dependencies.each do |dep|
-      @@locked << dep.to_formula
-    end unless ignore_deps?
+    unless ignore_deps?
+      formula.recursive_dependencies.each do |dep|
+        @@locked << dep.to_formula
+      end
+    end
     @@locked.unshift(formula)
     @@locked.uniq!
     @@locked.each(&:lock)

Library/Homebrew/test/test_hardware.rb

@@ -6,8 +6,10 @@ class HardwareTests < Homebrew::TestCase
     assert_includes [:intel, :ppc, :dunno], Hardware::CPU.type
   end
 
-  def test_hardware_intel_family
-    families = [:core, :core2, :penryn, :nehalem, :arrandale, :sandybridge, :ivybridge, :haswell, :broadwell, :skylake, :dunno]
-    assert_includes families, Hardware::CPU.family
-  end if Hardware::CPU.intel?
+  if Hardware::CPU.intel?
+    def test_hardware_intel_family
+      families = [:core, :core2, :penryn, :nehalem, :arrandale, :sandybridge, :ivybridge, :haswell, :broadwell, :skylake, :dunno]
+      assert_includes families, Hardware::CPU.family
+    end
+  end
 end